The survey, conducted from January 2016 to January 2017, collected information from more than 100,000 participants. It found that 25 percent of the population doesn’t identify with a faith group.
>> Related: Religious groups unite to shelter Harvey survivors
Predominantly white Protestant denominations, such as Presbyterians and Lutherans, have seen drops in membership, and the number of white evangelicals has decreased, the survey found.
As the presence of Latino Catholics in the U.S. has increased, the percentage of white American Catholics has decreased; approximately 55 percent of American Catholics identify as white, compared with 87 percent 25 years ago. And some white Catholics are leaving the church.
The percentage of Americans who identify as white evangelicals has decreased too.
According to the survey, about 17 percent of Americans identify as white evangelical, compared with 23 percent 10 years ago.
In regard to political affiliation, the PRRI found that more than 33 percent of Republicans identify as white evangelicals and nearly 75 percent identify as white Christians.
Only 29 percent of those who identify as Democrats are white Christians. Forty percent of Democrats surveyed said they have no religious affiliation, according to the report.
Read more at The Associated Press.<br/>